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論文

Unsteady natural convection in a cylindrical containment vessel (CIGMA) with external wall cooling; Numerical CFD simulation

Hamdani, A.; 安部 諭; 石垣 将宏; 柴本 泰照; 与能本 泰介

Energies (Internet), 13(14), p.3652_1 - 3652_22, 2020/07

 被引用回数:0

In the case of a severe accident, natural convection plays an important role in the atmosphere mixing of nuclear reactor containments. In this case, the natural convection might not in the steady-state condition. Hence, instead of steady-state simulation, the transient simulation should be performed to understand natural convection in the accident scenario within a nuclear reactor containment. The present study, therefore, was aimed at the transient 3-D numerical simulations of natural convection of air around a cylindrical containment with unsteady thermal boundary conditions (BCs) at the vessel wall. For this purpose, the experiment series was done in the CIGMA facility at Japan Atomic Energy Agency (JAEA). A 3-D model was simulated with OpenFOAM, applying the unsteady Reynolds-averaged Navier-Stokes equations (URANS) model. Different turbulence models were studied, such as the standard k-$$varepsilon$$, standard k-$$omega$$, k-$$omega$$ shear stress transport (SST), and low-Reynolds-k-$$varepsilon$$ Launder-Sharma. The results of the four turbulence models were compared versus the results of experimental data.

論文

A Review of fusion and tokamak research towards steady-state operation; A JAEA contribution

菊池 満

Energies (Internet), 3(11), p.1741 - 1789, 2010/11

 被引用回数:6 パーセンタイル:95.37(Energy & Fuels)

核融合研究開発50年を記念して核融合の基礎と定常トカマク炉の概念とそれに向けた研究の進展についてのレビューである。1990年に筆者が検討したブートストラップ電流を用いた定常トカマク炉SSTRの概念形成以降、トカマク研究は先進トカマク研究として大きく発展してきた。本レビューではトカマクにおける電流形成とMHD安定性に絞ったレビューを行った。

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